Birthday problems

I've installed many hacks from this board on 2.2.0. I've just been informed by some members that their birthdays are not being saved properly. They've noticed that if they save any changes to their profile, when they go back to it, it says their birthday is Nov. 31, 2000. Now because that isn't a real day, it shows up to others as Dec. 1, 2000. I went through this and the same thing happened to me.

Now I've proved by manually editing the database that the problem is not with it. When I edited my birthday directly to the correct date, the change stuck.

It seems to me the problem is with either the template that lets a user edit their profile, or with whatever part of the script actually saves the changes to the database. Can someone please help me figure out what to look for, or let me know if you've had the same problem?

[JJR512]

The problem is with the small calendar from vbPortals hack by wajones. I discovered this by commenting out the include 'cal.php'; statement required in the PHP include template. I will take this issue to the appropriate thread now, so this thread is done with.